[linux-dvb] saa7146_i2c_writeout: timed out waiting for end of xfer

Soeren Sonnenburg dvb-ml at nn7.de
Fri Sep 14 22:37:10 CEST 2007


On Thu, 2007-08-23 at 01:23 +0200, Oliver Endriss wrote:
> Soeren Sonnenburg wrote:
> > On Sun, 2007-08-19 at 01:05 +0200, Oliver Endriss wrote:
> > > Soeren Sonnenburg wrote:
> > > > On Tue, 2007-07-31 at 14:37 +0200, Oliver Endriss wrote:
> > > > > Stone wrote:
> > > > > > On 7/17/07, Oliver Endriss <o.endriss at gmx.de> wrote:
> > > > > > >
> > > > > > > Oliver Endriss wrote:
> > > > > > > > Imho the interrupt processing was broken:
> > > > > > > > - The first I2C interrupt should be used to wake-up the task.
> > > > > > > >   It does not matter that it takes some time until ERR in IIC_STA
> > > > > > > >   will be updated. We don't need it.
> > > > > > > > - Interrupts must be acknowledged at the end of the ISR.
> > > > > > > >
> > > > > > > > @all
> > > > > > > > Please test the attached patch.
> > > > > > > > There shouldn't be any unexpected I2C interrupts anymore.
> > [...]
> > > > I was now using this patch for 1-2 weeks. This setup has a FF-dvb-c and
> > > > a budget dvb-t card and after the patch there were no more timeout
> > > > messages. However since I added the asus p7131 I am seeing this message
> > > > regularly again (44 times in the last 5 days).
> > > > 
> > > > Thanks for investigating on this!!
> > > > Soeren
> > > 
> > > Just to be sure:
> > > You are using exactly the same setup, except for the new asus p7131?
> > 
> > yes, same setup + additional asus p7131.
> > 
> > > Strange. Maybe a power supply problem. Could you try another power
> > > supply for your machine?
> > 
> > This is a brand new power supply already (because I thought at some
> > point the usb disconnects were caused by a flaky power supply). However
> > following Hermanns suggestion I permuted the cards in the slots. One day
> > of up-time so far without seeing this message...
> 
> There have been reports that some mainboard layouts have problems to
> supply enoungh power on the PCI bus...
> 
> > I will report back when the messages re-appear...
> 
> Thanks.

OK, I did the following: I removed 2 pci cards put but left the p7131 in
and upgraded to 2.6.22.6. Since then I've never seen any of these
timeout messages, though still hangs with the p7131. However when
switching to F-connectors signal strength improved drastically and this
seems to also make the hangs go away for a longer time (crash after 5
days).

Still struggling,
Soeren
-- 
Sometimes, there's a moment as you're waking, when you become aware of
the real world around you, but you're still dreaming.



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